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Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2016
Long-term Debt, Unclassified [Abstract]  
Schedule of Debt Redemptions
In 2016, the following debt was redeemed:
Company
 
Month
 
Type
 
Interest Rate
 
Maturity
 
Amount
 
 
 
 
 
 
 
 
 
 
(In millions)
DTE Electric
 
March
 
Mortgage Bonds
 
7.904%
 
2016
 
$
10

DTE Energy
 
Various
 
Other Long-Term Debt
 
Various
 
2016
 
1

 
 
 
 
 
 
 
 
 
 
$
11